<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>自结束标签和注释</title>
</head>
<body>
    窗前明月光，
    <hr><!--大横线-->
    疑是地上霜
    <!--省略的注释-->
    <img src="图片链接" alt="图片名称">
    <input>输入框
</body>
</html>